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build system: When embedding binary files, fix re-generating on partial builds

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When embedding a generated file (ie secure boot public key data), the
file was being re-generated each time.
This commit is contained in:
Angus Gratton
2016-11-16 11:45:39 +11:00
parent 84635a160e
commit 872a481cf1
1 changed files with 19 additions and 8 deletions
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27
make/component_wrapper.mk
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@@ -189,18 +189,29 @@ OBJCOPY_EMBED_ARGS := --input binary --output elf32-xtensa-le --binary-architect
# txt files are null-terminated before being embedded (otherwise # txt files are null-terminated before being embedded (otherwise
# identical behaviour.) # identical behaviour.)
# #
# Files are temporarily copied to the build directory before objcopy,
# because objcopy generates the symbol name from the full command line
# path to the input file.
define GenerateEmbedTarget define GenerateEmbedTarget
$(1).$(2).o: $(call resolvepath,$(1),$(COMPONENT_PATH)) | $$(dir $(1))
# copy the input file into the build dir (using a subdirectory
# in case the file already exists elsewhere in the build dir)
embed_bin/$$(notdir $(1)): $(call resolvepath,$(1),$(COMPONENT_PATH)) | embed_bin
cp $$< $$@
embed_txt/$$(notdir $(1)): $(call resolvepath,$(1),$(COMPONENT_PATH)) | embed_txt
cp $$< $$@
echo -ne '\0' >> $$@ # null-terminate text files
# messing about with the embed_X subdirectory then using 'cd' for objcopy is because the
# full path passed to OBJCOPY makes it into the name of the symbols in the .o file
$(1).$(2).o: embed_$(2)/$$(notdir $(1)) | $$(dir $(1))
$(summary) EMBED $$@ $(summary) EMBED $$@
$(if $(filter-out $$(notdir $$(abspath $$<)),$$(abspath $$(notdir $$<))), cp $$< $$(notdir $$<) ) # copy input file to build dir, unless already in build dir cd embed_$(2); $(OBJCOPY) $(OBJCOPY_EMBED_ARGS) $$(notdir $$<) ../$$@
$$(if $$(subst bin,,$(2)),echo -ne '\0' >> $$(notdir $$<) ) # trailing NUL byte on text output
$(OBJCOPY) $(OBJCOPY_EMBED_ARGS) $$(notdir $$<) $$@ CLEAN_FILES += embed_$(2)/$$(notdir $(1))
rm $$(notdir $$<)
endef endef
embed_txt embed_bin:
mkdir -p $@
# generate targets to embed binary & text files # generate targets to embed binary & text files
$(foreach binfile,$(COMPONENT_EMBED_FILES), $(eval $(call GenerateEmbedTarget,$(binfile),bin))) $(foreach binfile,$(COMPONENT_EMBED_FILES), $(eval $(call GenerateEmbedTarget,$(binfile),bin)))